Target qubit decoupling in an echoed cross-resonance gate

A system, comprising:

• a memory that stores computer executable components;
• and
• a processor that executes the computer executable components stored in the memory, wherein the computer executable components comprise:
• a cross-resonance pulse component that applies a first pulse signal to a control qubit having a first resonant frequency;
• a decoupling pulse component that applies a second pulse signal to a target qubit coupled to the control qubit, the target qubit having a second resonant frequency, wherein the first and the second pulse signals are at the second resonant frequency and in phase at the target qubit;
• a state inversion pulse component that applies a third pulse signal to the control qubit at the first resonant frequency for creating an inverted state relative to a current state of the control qubit;
• a phase-inverted cross-resonance pulse component that applies a fourth pulse signal to the control qubit;
• and
• a phase-inverted decoupling pulse component that applies a fifth pulse signal to the target qubit, wherein the fourth and the fifth pulse signals are at the second resonant frequency and are in phase at the target qubit,
• wherein the fourth and fifth pulse signals include a substantially 180 degree phase difference relative to the respective first and second pulse signals.